Kawasaki ZR900 Performance model T304 Stainless De-cat exhaust pipe,NOT RS MODEL

The kawasaki zr900 performance model t304 stainless de-cat exhaust pipe is one of the finest bolt-on performance upgrades you can make to your Kawasaki Z900 Performance model, and at Max Torque Cans we’ve engineered it to deliver real-world results straight out of the box. If you’ve been frustrated by the weight, bulk, and restrictive nature of the standard catalytic converter box, this precision-crafted de-cat pipe is exactly what your bike has been waiting for. Built from high-grade T304 stainless steel and shaped using CNC mandrel bending technology, this is a product that combines serious engineering with effortless installation.

Please note: this listing is specifically for the Kawasaki Z900 Performance model only — NOT the RS model. Before purchasing, please double-check your exact variant to ensure a correct fitment.

Why Choose the Kawasaki ZR900 Performance Model T304 Stainless De-Cat Exhaust Pipe?

The standard catalytic converter box fitted to the Kawasaki Z900 Performance model is, frankly, a dead weight — both literally and figuratively. It tips the scales at a hefty 4.33 kg, it chokes your exhaust flow, and it contributes to that bloated, under-slung visual that does no favours for an otherwise aggressive naked bike. Our kawasaki zr900 performance model t304 stainless de-cat exhaust pipe strips all of that away and replaces it with a lean, purpose-built 2-inch CNC mandrel bent link pipe that weighs just 0.7 kg.

That’s a saving of 3.6 kg of dead weight — gone, instantly. When you’re riding a performance-oriented naked bike, every kilogram matters. Reduced unsprung and overall weight translates directly into sharper handling, improved throttle response, and a more engaging ride quality. Combined with the improved exhaust gas flow through a free-flowing 2-inch bore, you’ll notice the difference from the very first ride.

The T304 stainless steel construction isn’t just about looks, either — although it does look absolutely superb. T304 stainless offers excellent resistance to heat, corrosion, and the general punishment of British roads and British weather. This is a product built to last, not just to impress on day one.

Fitment and Installation: Kawasaki ZR900 Performance Model T304 Stainless De-Cat Exhaust Pipe

Installation is designed to be as straightforward as possible. This de-cat pipe fits directly where your standard cat box sits — there is no welding required. The pipe comes supplied with a new clamp, meaning you can remove the cat box and fit the new de-cat pipe using basic workshop tools, without needing to visit a garage or fabrication shop.

Crucially, this setup retains the original oxygen (O2) sensor in the front downpipes. This means your bike’s ECU continues to receive the sensor data it expects, keeping fuelling behaviour stable and avoiding unwanted warning lights or erratic running. It’s a clean, intelligent solution that respects your bike’s electronics rather than fighting them.

Your rear silencer — whether that’s the standard Kawasaki unit or an aftermarket can — will continue to fit exactly as before. The de-cat pipe simply slots into the existing configuration, removing the restrictive cat box from the equation while leaving everything else in place. It truly is a plug-and-play performance upgrade in the best sense of the phrase.

• CNC mandrel bent 2-inch link pipe — smooth, consistent bore for optimised flow
• T304 stainless steel construction — corrosion-resistant and built for longevity
• No welding required — supplied complete with a new clamp for easy fitment
• O2 sensor retained — keeps fuelling stable and ECU happy
• Weight saving of 3.6 kg — from 4.33 kg down to just 0.7 kg
• Compatible with standard or aftermarket silencers — total flexibility
• NOT for RS model — Performance model fitment only

MOT Considerations and Road Legality for the Kawasaki ZR900 Performance Model T304 Stainless De-Cat Exhaust Pipe

One of the most common questions we hear is: “Will removing the cat box cause my bike to fail its MOT?” The good news is that in the UK, motorcycles are tested for noise, not emissions. Provided your rear silencer is road-legal and within acceptable noise limits, fitting the kawasaki zr900 performance model t304 stainless de-cat exhaust pipe should not cause an MOT failure. If you already have a road-legal aftermarket silencer fitted, you can remove the cat box with confidence.

Of course, we always recommend riding responsibly and within the law. For track use or pure performance applications, removing the cat is an obvious step — but even for road riders, this upgrade is a practical, legal, and highly effective way to free up your Kawasaki Z900’s performance potential.

It’s also worth noting that our exhausts are engineered to deliver maximum performance gains without requiring a fuel remap straight away. However, if you’ve also fitted an aftermarket air filter and this de-cat pipe, having your fuelling optimised by a qualified tuner will always complement the improvements further and help your engine breathe and run at its absolute best.

A Note on Our Road Legal and Race Exhausts

At Max Torque Cans, we’re transparent about what we sell and how our products are classified. For clarity:

• Road Legal exhausts come with a removable Road Legal Baffle / Decibel Killer and BSAU (British Road-Legal) markings. Once the removable baffle is unbolted, the exhaust is then classified as a Race unit and is no longer road legal.
• Race exhausts do not include a removable road-legal baffle and carry no BSAU markings. These are intended for closed-road or track use.

If you’re unsure which option is right for your riding, feel free to get in touch with our team — we’re always happy to point you in the right direction.

Frequently Asked Questions

Will the kawasaki zr900 performance model t304 stainless de-cat exhaust pipe fit my Z900 RS?

No. This listing is specifically for the Kawasaki Z900 Performance model and will not fit the RS variant. Please ensure you select the correct listing for your specific model.

Do I need to remap my bike after fitting the de-cat pipe?

Not necessarily. Our de-cat pipe is designed to work without an immediate remap. However, if you’ve also fitted an aftermarket air filter or other performance modifications, a professional fuel tune will help you extract every last bit of performance from your setup.

Will my O2 sensor still work after fitting?

Yes. The kawasaki zr900 performance model t304 stainless de-cat exhaust pipe is designed to retain the front downpipe O2 sensor in its original position, keeping your fuelling and ECU functioning correctly.

Can I use my existing silencer or aftermarket can?

Absolutely. Whether you’re running the standard Kawasaki silencer or an aftermarket performance can, both will connect and fit exactly as they did before — the de-cat pipe simply replaces the restrictive cat box in the middle of the setup.

How difficult is installation?

Very straightforward. No welding is required. The pipe comes supplied with a new clamp and is designed to be fitted at home with standard workshop tools. Most riders complete the swap in under an hour.

If you’re exploring de-cat options for other bikes, you might also be interested in our Triumph 765 Moto 2 De-Cat pipe — another precision-engineered, bolt-on performance upgrade from the Max Torque Cans range.

The kawasaki zr900 performance model t304 stainless de-cat exhaust pipe is a no-nonsense, high-quality upgrade that delivers immediate, tangible benefits — less weight, better flow, and a sharper riding experience. Order yours today and feel the difference from your very first ride.